Diamond, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -24° (1985) 59° (1975) 1.75" NA
February 18° 35° -24° (1982) 70° (1976) 1.59" NA
March 29° 47° -3° (1978) 86° (1986) 2.74" NA
April 39° 61° 7° (1982) 92° (1986) 3.54" NA
May 50° 73° 27° (1971) 96° (1975) 3.95" NA
June 59° 83° 35° (1972) 103° (1988) 4.16" NA
July 63° 85° 44° (1979) 103° (1983) 3.72" NA
August 61° 83° 40° (1986) 102° (1988) 3.4" NA
September 53° 76° 27° (1974) 97° (1971) 2.95" NA
October 41° 64° 16° (1988) 91° (1971) 2.54" NA
November 31° 48° -1° (1977) 79° (1978) 3.09" NA
December 19° 35° -20° (1983) 69° (1982) 2.36" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 57° 80° 47° (1986) 89° (1973) 0.11" NA
Sep 2 57° 80° 48° (1993) 94° (1984) 0.11" NA
Sep 3 57° 80° 39° (1974) 90° (1973) 0.11" NA
Sep 4 56° 80° 43° (1972) 90° (1978) 0.11" NA
Sep 5 56° 79° 38° (1974) 91° (1990) 0.11" NA
Sep 6 56° 79° 40° (1984) 91° (1983) 0.1" NA
Sep 7 56° 79° 43° (1976) 97° (1971) 0.1" NA
Sep 8 55° 79° 40° (1986) 95° (1971) 0.1" NA
Sep 9 55° 79° 40° (1986) 96° (1978) 0.1" NA
Sep 10 55° 78° 41° (1986) 94° (1991) 0.1" NA
Sep 11 54° 78° 43° (1977) 93° (1983) 0.1" NA
Sep 12 54° 78° 40° (1975) 91° (1978) 0.1" NA
Sep 13 54° 77° 40° (1975) 89° (1978) 0.1" NA
Sep 14 53° 77° 37° (1974) 94° (1971) 0.1" NA
Sep 15 53° 77° 35° (1975) 91° (1991) 0.1" NA
Sep 16 53° 77° 36° (1984) 90° (1991) 0.1" NA
Sep 17 52° 76° 34° (1984) 91° (1988) 0.1" NA
Sep 18 52° 76° 39° (1984) 90° (1972) 0.1" NA
Sep 19 51° 76° 37° (1991) 86° (1988) 0.1" NA
Sep 20 51° 75° 32° (1991) 88° (1976) 0.1" NA
Sep 21 51° 75° 33° (1991) 87° (1980) 0.09" NA
Sep 22 50° 75° 32° (1976) 87° (1984) 0.09" NA
Sep 23 50° 74° 27° (1974) 89° (1988) 0.09" NA
Sep 24 49° 74° 29° (1995) 87° (1973) 0.09" NA
Sep 25 49° 73° 35° (1976) 85° (1973) 0.09" NA
Sep 26 49° 73° 35° (1984) 88° (1986) 0.09" NA
Sep 27 48° 73° 32° (1991) 88° (1971) 0.09" NA
Sep 28 48° 72° 32° (1991) 90° (1971) 0.09" NA
Sep 29 47° 72° 33° (1984) 85° (1971) 0.09" NA
Sep 30 47° 71° 29° (1984) 92° (1971) 0.09" NA
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